One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,6)(4,8)(5,7)(9,10)(11,15)(12,14)(13,16)(17,18,22,25)(19,26,27,32)(20,24,21,29)(23,30,31,28)(1,3,6,2)(4,8,5,7)(9,11,12,16)(10,13,14,15)(19,27)(23,31)(26,32)(28,30)(11,16)(13,15)(17,19,22,27)(18,23,25,31)(20,28,21,30)(24,32,29,26)(1,4,6,5)(2,7,3,8)(10,14)(13,15)(1,5,6,4)(2,7,3,8)(17,20,22,21)(18,24,25,29)(19,28,27,30)(23,32,31,26)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.